code: def generate_cat_feature() -> Series:
      return DataHelper.generate_obj_feature().astype("category")
  
imports: import copy
  import numpy
  import pandas
  import pytest
  from pandas import DataFrame, Series
  from autogluon.common.features.feature_metadata import FeatureMetadata
  from autogluon.features.generators import AbstractFeatureGenerator
label_desc: Use image node_id 4 for calling the DataHelper obj's underlying member method code with example usage: obj.generate_cat_feature() and returns: DataHelper